[6.03] Are the EIT waves really waves?

One sample of EIT wave is presented and discussed. The
bright front of the wave present two parts: one stationnary
and one moving arch. The stationnary part of the wave is
compared to the magnetic field lines extrapolated in
spherical coordinates with the potential assumptions. The
stationnary part is located where the footpoints of the
separatrixes of the magnetic field are. Another case of a
moving arch of an EIT wave is analyzed in conjonction with a
numerical simulation of the ejection of a magnetic flux
rope. The phenomelogy and the morphology of the both the
moving arch and the electric currents created by the
ejection of the flux rope are similar. We conclude that the
EIT wave phenomenon is possibly related to the generation of
electric currents while the magnetic field lines are
openning during a coronal mass ejection.